Meyer Sound S-1 - Manual
Meyer Sound S-1 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – Operating Instructions; Operation
- Page 3 – Limiter Operation; Oscillator
- Page 4 – Specifications
S-1
Control
Electronics
Unit
Operating Instructions
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
The Meyer Sound S-1 is
a single-channel active
signal processor de-
signed for use with the
USM-1 Loudspeaker. It
occupies a single 1
3
⁄
4
-
inch rack space.
The functions of the S-1
are:
•
Active crossover for
biamplification
•
SpeakerSense™
driver protection with
MultiSense™ function
•
True excursion limit-
ing to protect the
USM-1 drivers
•
Loudspeaker fre-
quency and phase
response alignment
Connections
The S-1 operates at line level and is intended to be the
final component in the signal chain before the power
amplifier. Connections between the S-1 and the power
amplifier should be made according to the diagram
above.
1. Signal inputs to the S-1 may be either balanced or
unbalanced. For best signal-to-noise ratio, use balanced
connections operating at +4 dBu nominal. The S-1 will
accept peak input levels up to +26 dBu balanced, or
+20 dBu unbalanced.
Note: The S-1 utilizes Meyer Sound’s exclusive ISO™
Input. Pins 1, 2 and 3 are transformer-isolated, and the
connector shell is connected to earth ground. The Input
GND/ Lift switch controls the connection between pin 1
and circuit common, which is tied to AC/chassis ground
through a 500 ohm resistance. If hum problems occur,
this switch may be used to control ground loops in the
system.
2. SpeakerSense™ connections are made from the
output of the power amplifier back to the S-1 Sense in-
puts. The Hi output of the power amplifier must be con-
nected to the Hi Sense input, and the Lo output of the
power amplifier to the Lo Sense input .
The Sense connection must be made in order for the
driver protection circuitry to operate properly.
Note: The S-1 Sense inputs incorporate Meyer Sound’s
exclusive MultiSense™ function, which allows use of
multiple power amplifiers driven in parallel from a single
S-1 and having different voltage gains and/or power
ratings. The S-1 accommodates up to two power amplifi-
ers, and provides a separate Sense input for each. The
MultiSense circuit automatically tracks the power ampli-
fier with the greatest output swing to control the system
protection circuitry. These inputs are polarity-sensitive:
be certain that they are connected with correct polar-
ity, as indicated on the S-1 rear panel.
3. Signal outputs from the S-1 are active balanced at
+4 dBu nominal operating level, with pin 1 tied to earth/
chassis ground through a 500 ohm resistance. The maxi-
mum output level is +26 dBu balanced (+20 dBu unbal-
anced).
4. Connections between the power amplifier output and
the USM-1 should be made in accordance with the
USM-1 Operating Instructions. These connections
must be verified for correct polarity and correct channel
assignment (Hi to Hi, Lo to Lo).
PUSH
+
–
PUSH
Input
Lift
GND
Input
Hi Sense
Lo Out
Hi Out
1/4 A SloBlo
90-105
105-125
210-250
180-210
AC Voltage
+
-
+
-
+
-
+
-
9 0 - 2 5 0 V A C
5 0 - 6 0 H z
1 0 0 m A M A X
CAUTION:
S e t v o l t a g e b e f o r e a p p l y i n g p o w e r .
AC Voltage Ranges
210 - 250
180 - 210
105 - 125
90 - 105
Lo Sense
Hi Channel
PUSH
+
–
Lo Channel
Amplifier
Loudspeaker Cable
Input
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Summary
Operating Instructions Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, CA 94702 S-1ControlElectronicsUnit Operation Once all the connections have been made and verified,the system is ready to operate. • The S-1 Attn dB level control should be set at mini-mum. • Switch on the AC power ...
S-1ControlElectronicsUnit Operating Instructions Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, CA 94702 Limiter Operation To verify limiter operation in the field: • Disconnect loudspeakers, leaving the amplifier andthe S-1 in their standard connection configuration. • If your ampli...
Operating Instructions Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, CA 94702 S-1ControlElectronicsUnit Specifications Input Type 1 Balanced ISO-Input , ™ 10k ohms, 5k ohms per leg Output Type Active push-pull, 600 ohms output impedance Maximum Input Level Balanced +26 dBu Unbalance...
